Laws of Magnetism

Laws of Magnetism

There are two fundamental laws of magnetism which are as follows :

Law 1 : It states that ‘Like magnetic poles repel and unlike poles attract each other'.

This is already mentioned in the properties of magnet.

 Law 1 : This law is experimentally proved by Scientist Coulomb and hence also known AS Coulomb's Law.

The force (F) exerted by one pole on the other pole is,

a) Directly proportional to the product of the pole strengths,

b) Inversely proportional to the square of the distance between them, and

c) Nature of medium surrounding the poles.       

Mathematically this law can be expressed as,

Fα M₁ M₂ / d²

where M, and M, are pole strengths of the poles while d is distance between the poles.

F = KM₁ M₂ / d²

where K depends on the nature of the surroundings and called permeability.

Review Question

1. State and explain the laws of magnetism.